Among the following statements,the correct statement about the half-life period for a first order reaction is

  • A
    Independent of concentration
  • B
    Proportional to concentration
  • C
    Inversely proportional to concentration
  • D
    Inversely proportional to the square of the concentration

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The first order integrated rate equation is

Hydrolysis of methyl acetate in aqueous solution has been studied by titrating the liberated acetic acid against sodium hydroxide. The concentration of the ester at different times is given below:
Time $(t)$ $\text{min}$ $0$ $30$ $60$ $90$
Conc. of ester $(C)$ $\text{mol L}^{-1}$ $0.850$ $0.800$ $0.754$ $0.710$

Show that it follows a pseudo first-order reaction as the concentration of $H_2O$ remains nearly constant $(54.2 \text{ mol L}^{-1})$ during the course of the reaction. What is the value of $k'$ in this reaction?

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The first order decomposition of $H_2O_2$ in an appropriate medium is characterised by a rate constant of $0.2303 \ min^{-1}$. What is the time (in $min$) required to complete $9/10$ fraction of the reaction?

The following data were obtained during the first-order decomposition of $2 A_{(g)} \rightarrow B_{(g)} + C_{(s)}$ at a constant volume and at a particular temperature. The rate constant in $min^{-1}$ is:
$S$.no.TimeTotal pressure in Pascal
$1.$At the end of $10 \ min$$300$
$2.$After completion$200$

For a first order reaction $t_{1/2}$ is $1200 \ s$. The specific rate constant in $s^{-1}$ is

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